// -*- mode:c++ -*-

// Copyright (c) 2009 The University of Edinburgh
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer;
// redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution;
// neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: Lei Zhang

// Opcode fields
def bitfield OPCODE_HI  <31:29>;    // general opcode
def bitfield OPCODE_LO  <28:21>;    // opcode for branch instructions

// Branch fields
def bitfield LK         <28>;       // link
def bitfield BC_HI      <27:24>;    // condition field
def bitfield BC_LO      <23:21>;   
def bitfield BC_MOV     <15:12>;    // for conditional move

// Register fields
def bitfield RS1            <15:11>;
def bitfield RS2            <10:6>;
def bitfield RD            <20:16>;
//def bitfield FRA           <20:16>;
//def bitfield FRB           <15:11>;
//def bitfield FRC           <10:6>;
//def bitfield FRS           <25:21>;
//def bitfield FRT           <25:21>;

// Specifies a CR or FPSCR field
//def bitfield BF            <25:23>;

//// Fields for FPSCR manipulation instructions
//def bitfield FLM           <24:17>;
//// Named so to avoid conflicts with potential template typenames
//def bitfield L_FIELD       <25>;
//// Named so to avoid conflicts with range_map.hh
//def bitfield W_FIELD       <16>;
//// Named so to avoid conflicts with range.hh
//def bitfield U_FIELD       <15:12>;

// Field for specifying a bit in CR or FPSCR
//def bitfield BT            <25:21>;
